...and would love some help with various problems. I'll start with some of the simple ones from my homework and if people help me on those, i will ask more (Nod)

Using the unit circle, find each value.

1. sin 90

2. tan 360

3. cot -180

It's so confusing, I don't get it at all. This is how far i got for #1:http://img.skitch.com/20080928-afi99...kweqsc5huw.jpg

Now, I thought that one part of that triangle will equal 1. but what part?

thanks!!!!